On World Malaria Day 2025 under the banner“Malaria Ends with Us”,China’s experience offers timely lessons for global malaria elimination.Certified malaria-free in 2021,China achieved this milestone through decades ...On World Malaria Day 2025 under the banner“Malaria Ends with Us”,China’s experience offers timely lessons for global malaria elimination.Certified malaria-free in 2021,China achieved this milestone through decades of reinvestment,local innovation,and strong political will.This commentary highlights key strategies:reinvestment after resurgence in the Huai River Basin,adaptive local leadership in Hainan,and cross-border collaboration in Yunnan.China’s integrated approach—combining ecological vector control,community engagement,and sustained surveillance—shows that ending malaria requires more than technology.It demands long-term commitment,innovation,and collective action.展开更多
股息现值模型 (Gordon model)、税后利润再投资有限增长模型 (Gordon and Gordon m odel)以及简化后的税后利润再投资有限增长模型 (Morris m odel)都无法为亏损公司的股票定价。根据弱有效市场假设 ,提出基于净利润的股票定价模型。该...股息现值模型 (Gordon model)、税后利润再投资有限增长模型 (Gordon and Gordon m odel)以及简化后的税后利润再投资有限增长模型 (Morris m odel)都无法为亏损公司的股票定价。根据弱有效市场假设 ,提出基于净利润的股票定价模型。该模型允许公司未来几年把全部或部分利润投资于盈利项目。展开更多
以内部收益率(internal rate of return,IRR)为基础的公司债到期收益率的计算隐含着债息再投资利率为IRR的假设,即假定所有时点再投资利率相同并有相同风险补偿,是一种偏离市场预期变化的主观假定;而外部收益率(external rate of return...以内部收益率(internal rate of return,IRR)为基础的公司债到期收益率的计算隐含着债息再投资利率为IRR的假设,即假定所有时点再投资利率相同并有相同风险补偿,是一种偏离市场预期变化的主观假定;而外部收益率(external rate of return,ERR)和修正内部收益率(modified internal rate of return,MIRR)将债息再投资利率固化为即期无风险利率,也无法反映未来利率变化。文章以隐含远期无风险利率为再投资利率的修正外部收益率(modified external rate of return,MERR)法,在去债息再投资风险补偿的同时,将未来利率预期变化嵌入模型,且根据远期利率的特征能够判断MERR对IRR的修正方向与幅度,以使投资者对债券到期收益的分析更加理性客观。展开更多
文摘On World Malaria Day 2025 under the banner“Malaria Ends with Us”,China’s experience offers timely lessons for global malaria elimination.Certified malaria-free in 2021,China achieved this milestone through decades of reinvestment,local innovation,and strong political will.This commentary highlights key strategies:reinvestment after resurgence in the Huai River Basin,adaptive local leadership in Hainan,and cross-border collaboration in Yunnan.China’s integrated approach—combining ecological vector control,community engagement,and sustained surveillance—shows that ending malaria requires more than technology.It demands long-term commitment,innovation,and collective action.
文摘股息现值模型 (Gordon model)、税后利润再投资有限增长模型 (Gordon and Gordon m odel)以及简化后的税后利润再投资有限增长模型 (Morris m odel)都无法为亏损公司的股票定价。根据弱有效市场假设 ,提出基于净利润的股票定价模型。该模型允许公司未来几年把全部或部分利润投资于盈利项目。
文摘以内部收益率(internal rate of return,IRR)为基础的公司债到期收益率的计算隐含着债息再投资利率为IRR的假设,即假定所有时点再投资利率相同并有相同风险补偿,是一种偏离市场预期变化的主观假定;而外部收益率(external rate of return,ERR)和修正内部收益率(modified internal rate of return,MIRR)将债息再投资利率固化为即期无风险利率,也无法反映未来利率变化。文章以隐含远期无风险利率为再投资利率的修正外部收益率(modified external rate of return,MERR)法,在去债息再投资风险补偿的同时,将未来利率预期变化嵌入模型,且根据远期利率的特征能够判断MERR对IRR的修正方向与幅度,以使投资者对债券到期收益的分析更加理性客观。
